| − | Tesseract-The Fourth demensional cube; the tesseract is a cube suspended in another cube with all the vertices or corners. The tesseract was used in Madelaine L'Engel's A Wrinkle In Time as a wrinkle in time the internal cube flows outward as the external one flows inward square by square. | + | Tesseract-The Fourth demensional cube; the tesseract is a cube suspended in another cube with all the vertices or corners connected. The tesseract was used in Madelaine L'Engel's A Wrinkle In Time as "a wrinkle in time" the internal cube flows outward as the external one flows inward square by square. |